Improve Phase and Solutions Flashcards
7 cards from real Lean Six Sigma Green Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Improve Phase and Solutions flashcards as text
In a Design of Experiments (DOE), what is the purpose of a 'center point'?
Answer: To detect curvature in the response surface
Center points are added to a factorial design to detect nonlinear (curved) relationships between factors and the response.
A project team wants to pilot a solution before full deployment. Which tool best structures the pilot plan?
Answer: Pilot plan with PDCA cycle
A pilot plan using the PDCA (Plan-Do-Check-Act) cycle structures the test, measurement, and review of a solution before full rollout.
What does 'mistake-proofing' (poka-yoke) primarily target in a process?
Answer: Preventing defects by making errors impossible or immediately detectable
Poka-yoke devices are designed to prevent errors from occurring or to detect them immediately if they do occur.
Which type of waste in Lean is represented by excess inventory beyond what is immediately needed?
Answer: Inventory
Inventory waste refers to excess materials, WIP, or finished goods that occupy space and tie up capital without adding value.
A team implements a solution and measures a 40% reduction in defects. What is the NEXT step in the Improve phase?
Answer: Verify the improvement is statistically significant and sustainable
After measuring improvement, the team must verify statistical significance and sustainability before declaring success or expanding.
In a 2^3 full factorial DOE, how many experimental runs are required (excluding replicates)?
Answer: 8
A 2^3 full factorial design with 3 factors each at 2 levels requires 2³ = 8 experimental runs.
Which lean tool is used to visually balance workload across operators to match customer takt time?
Answer: Operator balance chart
An operator balance chart (also called a work balance chart) displays each operator's cycle time against takt time to identify imbalances.